Browsed by
Category: Science/mathematics

A lucky few seem ‘resistant’ to Covid-19. Scientists want to know why

A lucky few seem ‘resistant’ to Covid-19. Scientists want to know why

STAT reports: Her husband collapsed just before reaching the top of the stairs in their small one-bedroom house in São Paulo, Brazil. Frantic, Thais Andrade grabbed the portable pulse oximeter she had purchased after hearing that a low oxygen reading could be the first sign of the novel coronavirus. Erik’s reading was hovering eight points lower than it had that morning. He also looked feverish. “When he hit 90% [on the oximeter], I said we can’t wait anymore,” Andrade recalled….

Read More Read More

Why the coronavirus has changed as it has, and what it means going forward

Why the coronavirus has changed as it has, and what it means going forward

STAT reports: It’s impossible to say how the coronavirus will continue to evolve. Those changes, after all, are a result of random mutations. But there are some fundamental principles that explain why the virus has morphed as it has, principles that could guide our understanding of its ongoing evolution — and what that means for our future with the pathogen. The great fear is that nature could spit out some new variant that completely saps the power of vaccines and…

Read More Read More

How will the coronavirus evolve?

How will the coronavirus evolve?

Dhruv Khullar writes: In 1988, Richard Lenski, a thirty-one-year-old biologist at UC Irvine, started an experiment. He divided a population of a common bacterium, E. coli, into twelve flasks. Each flask was kept at thirty-seven degrees Celsius, and contained an identical cocktail of water, glucose, and other nutrients. Each day, as the bacteria replicated, Lenski transferred several drops of each cocktail to a new flask, and every so often he stored samples away in a freezer. His goal was to…

Read More Read More

Massive new analysis confirms just how many Covid cases are truly asymptomatic

Massive new analysis confirms just how many Covid cases are truly asymptomatic

Science Alert reports: Within months of SARS-CoV-2’s emergence as a global catastrophe it was becoming clear that many who spread the disease did so unwittingly, experiencing not so much as a tickle in their throat to alert them of the danger within. Distinguishing those who are truly asymptomatic from those who are simply yet to show signs of the virus has made it hard to calculate a precise figure on the risks of succumbing to the illness. Now an analysis…

Read More Read More

The woman who brought us the world

The woman who brought us the world

Alice Dragoon writes: Had Virginia Tower Norwood listened to her high school guidance counselor, she would have become a librarian. Her aptitude test showed a remarkable facility with numbers, and in 1943, he could think of no better way for a young woman to put such skills to use. Luckily, Norwood didn’t suffer from the same lack of imagination. The salutatorian of her Philadelphia high school class, she had long been devouring logic puzzles and putting the slide rule her…

Read More Read More

Your vaccinated immune system is ready for breakthroughs

Your vaccinated immune system is ready for breakthroughs

Katherine J. Wu writes: A new dichotomy has begun dogging the pandemic discourse. With the rise of the über-transmissible Delta variant, experts are saying you’re either going to get vaccinated, or going to get the coronavirus. For some people—a decent number of us, actually—it’s going to be both. Coronavirus infections are happening among vaccinated people. They’re going to keep happening as long as the virus is with us, and we’re nowhere close to beating it. When a virus has so…

Read More Read More

We may finally know why the delta variant of coronavirus is so infectious

We may finally know why the delta variant of coronavirus is so infectious

Live Science reports: People infected with the delta variant of the novel coronavirus may be carrying more than a thousand times more virus particles and may test positive two days earlier than those infected with the original SARS-CoV-2, according to an early new study. The study has not been peer reviewed and looked at only a small number of cases in China, but if the results can be confirmed, they may explain, at least in part, why the delta variant…

Read More Read More

Coexisting with the coronavirus

Coexisting with the coronavirus

Katherine S. Xue writes: In the spring of 1846, a Dutch physician named Peter Ludwig Panum arrived on the Faroe Islands, a volcanic chain about two hundred miles northwest of Scotland. He found the Faroes to be a harsh and unforgiving place. The islands’ eight thousand inhabitants, who were Danish subjects at that time, spent their days outdoors, buffeted by sea winds, fishing and tending sheep. The conditions, Panum wrote, were unlikely “to prolong the lives of the inhabitants.” And…

Read More Read More

India’s true pandemic death toll likely to be well over 3 million, new study finds

India’s true pandemic death toll likely to be well over 3 million, new study finds

The New York Times reports: The number of people who have died in the coronavirus pandemic in India so far is likely to exceed three million — nearly 10 times the official Covid-19 death toll — making it one of the worst human tragedies in the nation’s history, according to a new study. In a comprehensive examination of the true toll of the pandemic in the sprawling nation of 1.4 billion, the Center for Global Development, a Washington research institute,…

Read More Read More

Ivermectin Covid-19 scandal shows how vulnerable science is to fraud

Ivermectin Covid-19 scandal shows how vulnerable science is to fraud

James Heathers and Gideon Meyerowitz-Katz write: Most scientists assume they will never come across a single case of fraud in their careers, and so even the thought of checking calculations in reviewable papers, re-running analyses, or checking if experimental protocols were properly deployed is deemed unnecessary. Worse, the accompanying raw data and analytical code often needed to forensically analyze a paper are not routinely published, and performing this kind of stringent review is often considered to be a hostile act,…

Read More Read More

Is it time to assume that health research is fraudulent until proven otherwise?

Is it time to assume that health research is fraudulent until proven otherwise?

Richard Smith, former editor of the British Medical Journal, writes: Health research is based on trust. Health professionals and journal editors reading the results of a clinical trial assume that the trial happened and that the results were honestly reported. But about 20% of the time, said Ben Mol, professor of obstetrics and gynaecology at Monash Health, they would be wrong. As I’ve been concerned about research fraud for 40 years, I wasn’t that surprised as many would be by…

Read More Read More

Huge study supporting ivermectin as Covid treatment withdrawn. Data appears ‘totally faked’

Huge study supporting ivermectin as Covid treatment withdrawn. Data appears ‘totally faked’

The Guardian reports: The efficacy of a drug being promoted by rightwing figures worldwide for treating Covid-19 is in serious doubt after a major study suggesting the treatment is effective against the virus was withdrawn due to “ethical concerns”. The preprint study on the efficacy and safety of ivermectin – a drug used against parasites such as worms and headlice – in treating Covid-19, led by Dr Ahmed Elgazzar from Benha University in Egypt, was published on the Research Square…

Read More Read More

Will Covid-19 change science? Past pandemics offer clues

Will Covid-19 change science? Past pandemics offer clues

Science reports: Although the past may not presage the future, epidemic history illuminates how change unfolds. “Historians often say that what an epidemic will do is expose underlying fault lines,” says Erica Charters, a historian of medicine at the University of Oxford who is studying how epidemics end. But how we respond is up to us. “When we ask, ‘How does the epidemic change society?’ it suggests there’s something in the disease that will guide us. But the disease doesn’t…

Read More Read More

The story of songbirds is a story of sugar

The story of songbirds is a story of sugar

Ed Yong writes: Australia’s unique forests are the birthplace of birdsong. The plants there are drenched in sunlight and can readily mass-produce sugars through photosynthesis. But with few nutrients in the soil, they struggle to convert those sugars into leaves, seeds, and other tissues. They end up with excess, which they simply give away. Flowers overflow with nectar. Eucalyptus trees exude a sweet substance called manna from their bark. Even insects that suck plant sap are forced to excrete surplus…

Read More Read More

Covid origins mirror SARS’s genesis in animals, study finds

Covid origins mirror SARS’s genesis in animals, study finds

Bloomberg reports: Early Covid-19 cases traced to markets in Wuhan, China, mirror the initial spread of SARS 17 years earlier, scientists said in a paper that concludes that an animal contagion is the most likely explanation for the pandemic’s genesis. The epidemiological history of SARS-CoV-2 is comparable to previous animal market-associated outbreaks of coronaviruses and offers a simple route for human exposure, Edward Holmes, Andrew Rambaut and 19 other researchers said Wednesday in a review of the scientific evidence pertaining…

Read More Read More

Birthday parties as virus vector

Birthday parties as virus vector

Margot Sanger-Katz writes: At the height of the pandemic, it was easy to worry that strangers would give you the virus. But a new study of what happened after people’s birthdays suggests that people we trust were also a common source of viral spread. Private gatherings have been harder for researchers to measure than big public events — they’re private, after all. And there has been a fierce debate for months among epidemiologists about just how big a factor they…

Read More Read More